Abstract:
Aim: This study evaluated the effect of surface sealants and repolishing to regain surface smoothness of bleached micro hybrid resin composite, and how long this effect presented after aging processes by thermocycling and tooth brushing.
Materials and Methods: a total number of 120 micro hybrid resin composite disc specimens were prepared using Teflon mold (10x2 mm), then bleached using Opalescence Boost 40%. The specimens were divided into 3 groups: G Ⅰ treated with Voco Easy Glaze surface sealant, G Ⅱ treated with PermaSeal surface sealant, and G Ⅲ repoloshed by OneGloss. Aging process (tooth brushing followed by thermocycling) was applied. Surface roughness was measured using profilometer after bleaching, treatment readings, and aging. The data were statistically recorded and compared at 5% level of significance.
Results: One Way ANOVA test showed significant decrease in (Ra) after treatment and aging for each group with the highest decrease was by Voco Easy Glaze, followed by PermaSeal and One Gloss. Kruskil wallis test showed significant decrease in surface roughness after treatment and aging. The aging showed statistically significant reincrease in roughness in all groups, and Voco Easy Glaze showed the least durability.
Conclusions: Surface Sealants application improved surface smoothness of bleached resin composite, and the durability of this smoothness is material dependent.